The 4SM command line is stored in an executable text file which is called image_name.sh. It must be made executable. I use gedit in LINUX/GNOME as my text editor: "gedit myimage.sh &". For a 3-bands image, see tarawa_subset.sh For a 4-bands image, see tmnov.sh For a 17 bands image, see mb4.sh

Structure of a 4SM command line

The command line script starts as follows: nice -20 ./4SM...

nice -20 is not really part of it: it is used to set a very low priority level. nice -0 would be an average level.

The command line is a long and complex character string which starts with the name of the executable code like ./4SM.7.11.

This string is composed of many arguments.

With the exception of the executable code name (e.g. 4SM) in the first argument, each following argument starts with a "-" character.

Each argument is a complex string of characters which is decoded at the start of the execution.